Sorry for the delay (4 years) in replying. The engine is the 3.8. I'll have to post my update video someday.

I can't remember if I mentioned it in one of my previous posts but in January of 2014 at 517,000 miles I was replacing the leaky valve cover gaskets and I noticed the valve train on the rear head was nearly dry. It wasn't getting any oil so I pulled the heads and had them done, put in new rings and bearings, oil pump, hoses, etc,

The van now has 618,000 miles on it. Original cam and cam bearings! How is that possible?! Once the rebuild work was done I just kept driving and in June of 2016 I reached 600K. As of today, the van is still running well but being in Minnesota means the rust is probably going to kill it before the motor dies.

I have an Amsoil Bypass Oil Filter on my 2014 WRX. It's been on there for 12,000 miles Ive had 2 UOA and they both came back great. The car only has 24,000 miles on it and I want to take it off and cut it open but at 50 bucks a filter I'm gonna leave it on longer. I will post the pics once I do cut it open. Cant wait, I do always cut open all my regular full flow filters, cut out the media from the housing and look into the pleats for any signs of metal. I did find my 2006 silverado 4.8L making metal at 210,000. It was 2 cam lobes, Changed the cam and the lifters and no more metal. Its been 55,000 miles since the cam replacement. That's all I have ever seen inside the pleats and I've cut open Id say 40 filters.

I have an Amsoil Bypass Oil Filter on my 2014 WRX. It's been on there for 12,000 miles Ive had 2 UOA and they both came back great. The car only has 24,000 miles on it and I want to take it off and cut it open but at 50 bucks a filter I'm gonna leave it on longer. I will post the pics once I do cut it open.

You shouldn't find anything in those pleats, ever..... not to the human eye, anyway

- - - not if the oil that goes to the bypass filter comes from the "clean oil" side of the full flow oil filter, like mine does.

"The evidence demands a verdict".(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

I have an Amsoil Bypass Oil Filter on my 2014 WRX. It's been on there for 12,000 miles Ive had 2 UOA and they both came back great. The car only has 24,000 miles on it and I want to take it off and cut it open but at 50 bucks a filter I'm gonna leave it on longer. I will post the pics once I do cut it open.

You shouldn't find anything in those pleats, ever..... not to the human eye, anyway

- - - not if the oil that goes to the bypass filter comes from the "clean oil" side of the full flow oil filter, like mine does.

I have the oil coming off a sandwich plate pre full flow. Just FYIMark

Just saw this post - thought I'd throw in my experience with my Amsoil BP filter.I have an 05 VW GTI (bought new) with 1.8 Turbo. Must use synthetic because of the snotting issues if you use mineral oil. I have used Pentosin Hi Perf II 5W-40 once the car came off the free maintenance (and Castrol Syntec) at 40K miles. Normal oil filter was replaced with an equivalent larger Mann filter for additional oil capacity. Engine has Revo Stage 1 software as well as a larger 2.5" turbo back exhaust and larger dia intake pipe. Bigger intercooler as well.Added the Amsoil single BP kit at approx 25K miles. UOA analysis has been done since 50K miles. OCI started at 5K miles and have steadily increased to the current 12K at 156K miles. Fe ppm have slowly increased from 7 PPM to latest value of 19 PPM. Sn is consistent between 0 and 2 while Pb has slowly increased from 1 to 4 PPM. Cu ran from 2 to 7 while Al is steady at 2 PPM. All other engine metals are 0.Only real issue from the UOA has been due to spark issues - lost an Ir spark plug tip giving non-zero fuel %. Insoluble % varies from 0 to trace levels (<0.1%).Even though this has been an expensive set of UOA and oil changes (9 qts of syn every change), I prefer to see any issues early on - hopefully before they become catastrophic. There has been no major engine work except for the required timing belt changes. The car continues to jump when you stick your foot in it and sips gas when you don't.